[Effects of TCE and PCE on cultured human keratinocyte lipid peroxidation and protective effect of vitamin E on it].

OBJECTIVE

To explore the different concentrations of trichloroethylene (TCE) or perchloroethylene (PCE) induced cultured normal human epidermal keratinocyte (KC) lipid peroxidation and protective effect of Vitamin E on it.

METHODS

KC derived from 3 or more donors were pooled together and cultured with K-SFM. Neutral Red Uptake Assay was used to determine the IC50 of TCE or PCE, and then different concentrations of TCE or PCE were administered for culturing KC; 0.5 mmol/L TCE or 0.2 mmol/L PCE and different concentrations of Vitamin E were used to determine the protective effect of Vitamin E. After 4 hours' culture, kits were used to determine cellular MDA, SOD and ROS level.

RESULTS

Treatment of KC with different concentrations of TCE or PCE showed significant dose-related variations in lipid peroxidation, with the higher concentration, higher level of MDA, ROS and lower activity of SOD displayed in this study. Vitamin E 10 - 200 mmol/L dose-dependently attenuated MDA and ROS level, and increased SOD activities.

CONCLUSION

TCE or PCE can induce the lipid peroxidation in cultured KC and Vitamin E protects it from TCE- or PCE-induced peroxidation.